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Simplifying 7 + 2x = x + -4(2x + x) Combine like terms: 2x + x = 3x 7 + 2x = x + -4(3x) Remove parenthesis around (3x) 7 + 2x = x + -4 * 3x Multiply -4 * 3 7 + 2x = x + -12x Combine like terms: x + -12x = -11x 7 + 2x = -11x Solving 7 + 2x = -11x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11x' to each side of the equation. 7 + 2x + 11x = -11x + 11x Combine like terms: 2x + 11x = 13x 7 + 13x = -11x + 11x Combine like terms: -11x + 11x = 0 7 + 13x = 0 Add '-7' to each side of the equation. 7 + -7 + 13x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 13x = 0 + -7 13x = 0 + -7 Combine like terms: 0 + -7 = -7 13x = -7 Divide each side by '13'. x = -0.5384615385 Simplifying x = -0.5384615385
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